A cloud server includes a computing service provider, a communication unit and a processing unit. The computing service provider is configured to provide a computing service. The communication unit is configured to receive from a mobile terminal a request for the computing service that allows the mobile terminal to use at least one first image provided by a remote device supporting the computing service. The processing unit is configured to generate at least one second image for transmitting to the remote device based on the request and the at least one first image.